US3611583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for expanding and drying expandable microspheres
Assignee: Casco Adhesives AB
•
Filing: 1970-05-28
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Granted: 1971-10-12
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Expires: 1990-05-28
Abstract
Abstract EXPANDABLE MICROSPHERES ARE EXPANDED AND DRIED BY FORMULATING WITH A WATER DISPERSIBLE FLOCCULANT, SPREADING THE SLURRY IN A THIN LAYER ON A HEATED BELT AND DRYING THE LAYER WITH THE AID OF HOT AIR.
Inventors
- 👤 Thomas F Anderson
- 👤 Glen L Gunderman
- 👤 Harold A Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:55
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/32; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S264/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |